This page explains how Rodney Linn Peffer (USATT# 9004)'s rating went from 1874 to 1851 at the PA Team Tournament held on - 19 Mar 2006. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.